142320131 has 4 divisors (see below), whose sum is σ = 142778064. Its totient is φ = 141862200.

The previous prime is 142320097. The next prime is 142320149. The reversal of 142320131 is 131023241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131023241 = 337 ⋅388793.

It is a cyclic number.

It is not a de Polignac number, because 142320131 - 2¹⁸ = 142057987 is a prime.

It is a super-2 number, since 2×142320131² = 40510039375714322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142323131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228500 + ... + 229121.

It is an arithmetic number, because the mean of its divisors is an integer number (35694516).

Almost surely, 2^142320131 is an apocalyptic number.

142320131 is a deficient number, since it is larger than the sum of its proper divisors (457933).

142320131 is an equidigital number, since it uses as much as digits as its factorization.

142320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457932.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 142320131 is about 11929.8001240591. The cubic root of 142320131 is about 522.1021059003.

Adding to 142320131 its reverse (131023241), we get a palindrome (273343372).

The spelling of 142320131 in words is "one hundred forty-two million, three hundred twenty thousand, one hundred thirty-one".